Nortel SONET AccessNode 800A Series - Page 315

Cabinet maintenance operations 12-23
AccessNode Series 800A Outside Plant Cabinet Installation 323-3001-210 Issue 1.0
Procedure 12-3 (continued)
Adjusting the high voltage shutdown for replacement rectifiers
Step Action
9 Watch the DVM readings and slowly (see CAUTION 2 on page 12-22) adjust
the FLT potentiometer clockwise to increase the float voltage until either -56.0
V dc is reached or High Voltage Shutdown (HVSD) occurs.
Note 1: The ON/RFA LED illuminates red and the rectifier shuts down.
Record the voltage measurement.
Note 2: If the -56.0 V level cannot be reached, hold the FLT/EQL switch in
the EQL position while adjusting the FLT potentiometer.
10 Verify the HVSD level:
11 Continue rectifier adjustments by using Procedure 12-4 on page 12-24.
—end—
If the HVSD Then
Occurred at -56.0 V dc go to step 11.
Occurred before -56.0 V dc slowly and slightly adjust the HVSD
potentiometer clockwise to increase the HVSD
limit.
Go to step 7.
Did not occur before -56.0 V dc
was reached
slowly and slightly adjust the HVSD
potentiometer counterclockwise to decrease
the HVSD limit.
Go to step 7.